JPS57142031A - Photoelectric conversion circuit - Google Patents

Photoelectric conversion circuit

Info

Publication number
JPS57142031A
JPS57142031A JP56028905A JP2890581A JPS57142031A JP S57142031 A JPS57142031 A JP S57142031A JP 56028905 A JP56028905 A JP 56028905A JP 2890581 A JP2890581 A JP 2890581A JP S57142031 A JPS57142031 A JP S57142031A
Authority
JP
Japan
Prior art keywords
output
vof
optical signal
trq11
inputted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56028905A
Other languages
Japanese (ja)
Inventor
Takashi Shimada
Takahiro Asai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP56028905A priority Critical patent/JPS57142031A/en
Publication of JPS57142031A publication Critical patent/JPS57142031A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled

Landscapes

  • Electronic Switches (AREA)
  • Dc Digital Transmission (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To increase the temperature stability, by minimizing factors to bias fluctuation and giving the reproducibility to the fluctuation. CONSTITUTION:A DC bias of an output point (emitter of an emitter follower Q3) when an optical signal is not inputted from a photodiode PD is 2VBE+VOF. When the optical signal is inputted, the potential at this point is lowered by Vp to be 2VBE+VOF-Vp. When this output passes through a circuit consisting of an emitter follower Q10 and a transistor (TR)Q11 with common emitter, the potential becomes the VOF with no optical signal and VOF-Vp with the optical signal. Thus, the collector voltage of the TRQ11 can be represented with the parameter only without temperature dependancy and the high temperature stability can be achieved. The output of the TRQ11 is inputted to one input of a comparator CM, to which an average value of the output of the TRQ11 is applied as a reference input, allowing to achieve an output of ''H'' level or ''L'' level.
JP56028905A 1981-02-27 1981-02-27 Photoelectric conversion circuit Pending JPS57142031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56028905A JPS57142031A (en) 1981-02-27 1981-02-27 Photoelectric conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56028905A JPS57142031A (en) 1981-02-27 1981-02-27 Photoelectric conversion circuit

Publications (1)

Publication Number Publication Date
JPS57142031A true JPS57142031A (en) 1982-09-02

Family

ID=12261417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56028905A Pending JPS57142031A (en) 1981-02-27 1981-02-27 Photoelectric conversion circuit

Country Status (1)

Country Link
JP (1) JPS57142031A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02179116A (en) * 1988-12-29 1990-07-12 Koudenshi Kogyo Kenkyusho:Kk Optical input signal processing circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02179116A (en) * 1988-12-29 1990-07-12 Koudenshi Kogyo Kenkyusho:Kk Optical input signal processing circuit

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